Paint the faux mushroom whatever color you'd like the nose to be. Also paint wooden words if you'll be using them to decorate the hat.
Remove the black and silver tinsel from the witch hat decoration to reveal a plastic hat wreath frame. Snip off the bottom section as shown.
Create a beard by zip tying the fall leaf stems to the wreath frame. When you like the shape of the beard, pull zip ties tight and cut off the excess.
Lay the hat frame over the sweater (with bottom edge turned up to make a brim if desired) and cut around it, leaving plenty of excess.
Cut the sleeves off the sweater and place them over the hat frame. Add stuffing if desired to plump up the hat. Place the piece of sweater you cut in the last step over the wreath.
Glue the sweater piece to the wreath frame along the sides (not across the front).
Flip the wreath over and fold in each side of the sweater and glue to secure. Poke a small hole through the sweater to pull the hanging loop out.
Tie the top of the hat with jute and trim off any excess sweater. Glue the nose to the bottom of the wreath frame and the center leaf stem. Also glue the nose to the sweater brim. (Trim a little off the bottom of the mushroom if needed for the nose to be the right height.)
Glue on any other embellishments as desired, including the fall wood words.